“藍天有多高”這個問題可以從不同角度理解:
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大氣層高度
藍天其實是地球大氣層中散射陽光形成的現象。地球大氣層大約有100公里厚度,主要分為對流層、平流層、中間層、熱層和散逸層。我們看到的藍天主要是對流層和平流層的部分,大約從地面到10-50公里高空。
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視覺感受上的“高度”
藍天給人的感覺是無邊無際,沒有明確的“高度”界限。因為大氣分布是連續的,隨著高度增加空氣越來越稀薄,藍色也會逐漸變淡,最終在高空(大約100公里以上)變成黑色的太空。
總結:
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藍天的“高度”可以理解為地球大氣層的厚度,主要是幾十公里到上百公里;但從視覺上來說,藍天沒有明確的高度界限,是大氣散射陽光今形成的漸變現象。
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